Complete the prologue by (not) talking to your mother.
Bad Ending I.
Survive a day of school.
Bad Ending II.
Complete Chapter 1 by having someone interrupt your time with Asuka.
Complete Chapter 1 by having someone interrupt your time with Ayanami.
Complete Chapter 1 wishing someone would interrupt your time with Kaworu and his existential insecurities.
Bad Ending III.
Survive another day of school.
Visit the tunnel entrance.
Get BURNED twice in a row.
Hold hands with Asuka while exploring the tunnels.
Deny Kaworu a hug because of your sexual insecurities while exploring the tunnels.
Spend some alone time with Toji.
Bad Ending IV.
Complete Chapter 2 after exploring the caves with the gang.
Bad Ending V.
Complete Chapter 3 by spending the evening with Asuka, Hikari and Toji.
Complete Chapter 4 by spending the afternoon with Ayanami at the beach.
Complete Chapter 4 by spending some time with Kaworu after the concert.
Keep repeating to yourself that you Mustn't Run Away.
Complete Chapter 5 by staying with Asuka.
Complete Chapter 5 by going out with Ayanami.
Complete Chapter 6 supporting Asuka.
Complete Chapter 6 supporting Ayanami.
Bad Ending VI.
Complete Chapter 7 by doing pretty much nothing.
Get Asuka's finale.
Get Rei's finale.
Tell Ayanami how you feel about Asuka while exploring the tunnels.